From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: Getting 'sync' to flush disk cache? Date: Mon, 14 Aug 2006 22:15:46 +0200 Message-ID: <20060814201545.GE16819@suse.de> References: <44E0C373.6060008@garzik.org> <1155584098.2886.271.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from brick.kernel.dk ([62.242.22.158]:3923 "EHLO kernel.dk") by vger.kernel.org with ESMTP id S932693AbWHNUOF (ORCPT ); Mon, 14 Aug 2006 16:14:05 -0400 Content-Disposition: inline In-Reply-To: <1155584098.2886.271.camel@laptopd505.fenrus.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Arjan van de Ven Cc: Jeff Garzik , Linux Kernel , Andrew Morton , SCSI Mailing List , Linux RAID Mailing List On Mon, Aug 14 2006, Arjan van de Ven wrote: > On Mon, 2006-08-14 at 14:39 -0400, Jeff Garzik wrote: > > So... has anybody given any thought to enabling fsync(2), fdatasync(2), > > and sync_file_range(2) issuing a [FLUSH|SYNCHRONIZE] CACHE command? > > > > This has bugged me for _years_, that Linux does not do this. Looking at > > forums on the web, it bugs a lot of other people too. > > eh afaik 2.6.17 and such do this if you have barriers enabled... That is correct, but it only works on reiserfs and XFS and user space really cannot tell whether it did the right thing or not. File system developers really should take this more seriously... -- Jens Axboe